<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/Users/m018/.cargo/registry/src/github.com-1ecc6299db9ec823/siphasher-0.3.11/src/sip.rs`."><title>sip.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Bold-a2c9cd1067f8b328.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-c4dbdcde0fbd8430.css" id="mainThemeStyle"><link rel="stylesheet" id="themeStyle" href="../../static.files/light-db279b6232be9c13.css"><link rel="stylesheet" disabled href="../../static.files/dark-cf923f49f397b216.css"><link rel="stylesheet" disabled href="../../static.files/ayu-be46fdc453a55015.css"><script src="../../static.files/storage-3891ce972e3a2bf8.js"></script><script defer src="../../static.files/source-script-1b95b7cca98b26e5.js"></script><script defer src="../../source-files.js"></script><script defer src="../../static.files/main-98a684e84ae5b08b.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-13285aec31fa243e.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"></nav><main><nav class="sub"><a class="sub-logo-container" href="../../siphasher/index.html"><img class="rust-logo" src="../../static.files/rust-logo-151179464ae7ed46.svg" alt="logo"></a><form class="search-form"><span></span><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><a href="#1" id="1">1</a>
<a href="#2" id="2">2</a>
<a href="#3" id="3">3</a>
<a href="#4" id="4">4</a>
<a href="#5" id="5">5</a>
<a href="#6" id="6">6</a>
<a href="#7" id="7">7</a>
<a href="#8" id="8">8</a>
<a href="#9" id="9">9</a>
<a href="#10" id="10">10</a>
<a href="#11" id="11">11</a>
<a href="#12" id="12">12</a>
<a href="#13" id="13">13</a>
<a href="#14" id="14">14</a>
<a href="#15" id="15">15</a>
<a href="#16" id="16">16</a>
<a href="#17" id="17">17</a>
<a href="#18" id="18">18</a>
<a href="#19" id="19">19</a>
<a href="#20" id="20">20</a>
<a href="#21" id="21">21</a>
<a href="#22" id="22">22</a>
<a href="#23" id="23">23</a>
<a href="#24" id="24">24</a>
<a href="#25" id="25">25</a>
<a href="#26" id="26">26</a>
<a href="#27" id="27">27</a>
<a href="#28" id="28">28</a>
<a href="#29" id="29">29</a>
<a href="#30" id="30">30</a>
<a href="#31" id="31">31</a>
<a href="#32" id="32">32</a>
<a href="#33" id="33">33</a>
<a href="#34" id="34">34</a>
<a href="#35" id="35">35</a>
<a href="#36" id="36">36</a>
<a href="#37" id="37">37</a>
<a href="#38" id="38">38</a>
<a href="#39" id="39">39</a>
<a href="#40" id="40">40</a>
<a href="#41" id="41">41</a>
<a href="#42" id="42">42</a>
<a href="#43" id="43">43</a>
<a href="#44" id="44">44</a>
<a href="#45" id="45">45</a>
<a href="#46" id="46">46</a>
<a href="#47" id="47">47</a>
<a href="#48" id="48">48</a>
<a href="#49" id="49">49</a>
<a href="#50" id="50">50</a>
<a href="#51" id="51">51</a>
<a href="#52" id="52">52</a>
<a href="#53" id="53">53</a>
<a href="#54" id="54">54</a>
<a href="#55" id="55">55</a>
<a href="#56" id="56">56</a>
<a href="#57" id="57">57</a>
<a href="#58" id="58">58</a>
<a href="#59" id="59">59</a>
<a href="#60" id="60">60</a>
<a href="#61" id="61">61</a>
<a href="#62" id="62">62</a>
<a href="#63" id="63">63</a>
<a href="#64" id="64">64</a>
<a href="#65" id="65">65</a>
<a href="#66" id="66">66</a>
<a href="#67" id="67">67</a>
<a href="#68" id="68">68</a>
<a href="#69" id="69">69</a>
<a href="#70" id="70">70</a>
<a href="#71" id="71">71</a>
<a href="#72" id="72">72</a>
<a href="#73" id="73">73</a>
<a href="#74" id="74">74</a>
<a href="#75" id="75">75</a>
<a href="#76" id="76">76</a>
<a href="#77" id="77">77</a>
<a href="#78" id="78">78</a>
<a href="#79" id="79">79</a>
<a href="#80" id="80">80</a>
<a href="#81" id="81">81</a>
<a href="#82" id="82">82</a>
<a href="#83" id="83">83</a>
<a href="#84" id="84">84</a>
<a href="#85" id="85">85</a>
<a href="#86" id="86">86</a>
<a href="#87" id="87">87</a>
<a href="#88" id="88">88</a>
<a href="#89" id="89">89</a>
<a href="#90" id="90">90</a>
<a href="#91" id="91">91</a>
<a href="#92" id="92">92</a>
<a href="#93" id="93">93</a>
<a href="#94" id="94">94</a>
<a href="#95" id="95">95</a>
<a href="#96" id="96">96</a>
<a href="#97" id="97">97</a>
<a href="#98" id="98">98</a>
<a href="#99" id="99">99</a>
<a href="#100" id="100">100</a>
<a href="#101" id="101">101</a>
<a href="#102" id="102">102</a>
<a href="#103" id="103">103</a>
<a href="#104" id="104">104</a>
<a href="#105" id="105">105</a>
<a href="#106" id="106">106</a>
<a href="#107" id="107">107</a>
<a href="#108" id="108">108</a>
<a href="#109" id="109">109</a>
<a href="#110" id="110">110</a>
<a href="#111" id="111">111</a>
<a href="#112" id="112">112</a>
<a href="#113" id="113">113</a>
<a href="#114" id="114">114</a>
<a href="#115" id="115">115</a>
<a href="#116" id="116">116</a>
<a href="#117" id="117">117</a>
<a href="#118" id="118">118</a>
<a href="#119" id="119">119</a>
<a href="#120" id="120">120</a>
<a href="#121" id="121">121</a>
<a href="#122" id="122">122</a>
<a href="#123" id="123">123</a>
<a href="#124" id="124">124</a>
<a href="#125" id="125">125</a>
<a href="#126" id="126">126</a>
<a href="#127" id="127">127</a>
<a href="#128" id="128">128</a>
<a href="#129" id="129">129</a>
<a href="#130" id="130">130</a>
<a href="#131" id="131">131</a>
<a href="#132" id="132">132</a>
<a href="#133" id="133">133</a>
<a href="#134" id="134">134</a>
<a href="#135" id="135">135</a>
<a href="#136" id="136">136</a>
<a href="#137" id="137">137</a>
<a href="#138" id="138">138</a>
<a href="#139" id="139">139</a>
<a href="#140" id="140">140</a>
<a href="#141" id="141">141</a>
<a href="#142" id="142">142</a>
<a href="#143" id="143">143</a>
<a href="#144" id="144">144</a>
<a href="#145" id="145">145</a>
<a href="#146" id="146">146</a>
<a href="#147" id="147">147</a>
<a href="#148" id="148">148</a>
<a href="#149" id="149">149</a>
<a href="#150" id="150">150</a>
<a href="#151" id="151">151</a>
<a href="#152" id="152">152</a>
<a href="#153" id="153">153</a>
<a href="#154" id="154">154</a>
<a href="#155" id="155">155</a>
<a href="#156" id="156">156</a>
<a href="#157" id="157">157</a>
<a href="#158" id="158">158</a>
<a href="#159" id="159">159</a>
<a href="#160" id="160">160</a>
<a href="#161" id="161">161</a>
<a href="#162" id="162">162</a>
<a href="#163" id="163">163</a>
<a href="#164" id="164">164</a>
<a href="#165" id="165">165</a>
<a href="#166" id="166">166</a>
<a href="#167" id="167">167</a>
<a href="#168" id="168">168</a>
<a href="#169" id="169">169</a>
<a href="#170" id="170">170</a>
<a href="#171" id="171">171</a>
<a href="#172" id="172">172</a>
<a href="#173" id="173">173</a>
<a href="#174" id="174">174</a>
<a href="#175" id="175">175</a>
<a href="#176" id="176">176</a>
<a href="#177" id="177">177</a>
<a href="#178" id="178">178</a>
<a href="#179" id="179">179</a>
<a href="#180" id="180">180</a>
<a href="#181" id="181">181</a>
<a href="#182" id="182">182</a>
<a href="#183" id="183">183</a>
<a href="#184" id="184">184</a>
<a href="#185" id="185">185</a>
<a href="#186" id="186">186</a>
<a href="#187" id="187">187</a>
<a href="#188" id="188">188</a>
<a href="#189" id="189">189</a>
<a href="#190" id="190">190</a>
<a href="#191" id="191">191</a>
<a href="#192" id="192">192</a>
<a href="#193" id="193">193</a>
<a href="#194" id="194">194</a>
<a href="#195" id="195">195</a>
<a href="#196" id="196">196</a>
<a href="#197" id="197">197</a>
<a href="#198" id="198">198</a>
<a href="#199" id="199">199</a>
<a href="#200" id="200">200</a>
<a href="#201" id="201">201</a>
<a href="#202" id="202">202</a>
<a href="#203" id="203">203</a>
<a href="#204" id="204">204</a>
<a href="#205" id="205">205</a>
<a href="#206" id="206">206</a>
<a href="#207" id="207">207</a>
<a href="#208" id="208">208</a>
<a href="#209" id="209">209</a>
<a href="#210" id="210">210</a>
<a href="#211" id="211">211</a>
<a href="#212" id="212">212</a>
<a href="#213" id="213">213</a>
<a href="#214" id="214">214</a>
<a href="#215" id="215">215</a>
<a href="#216" id="216">216</a>
<a href="#217" id="217">217</a>
<a href="#218" id="218">218</a>
<a href="#219" id="219">219</a>
<a href="#220" id="220">220</a>
<a href="#221" id="221">221</a>
<a href="#222" id="222">222</a>
<a href="#223" id="223">223</a>
<a href="#224" id="224">224</a>
<a href="#225" id="225">225</a>
<a href="#226" id="226">226</a>
<a href="#227" id="227">227</a>
<a href="#228" id="228">228</a>
<a href="#229" id="229">229</a>
<a href="#230" id="230">230</a>
<a href="#231" id="231">231</a>
<a href="#232" id="232">232</a>
<a href="#233" id="233">233</a>
<a href="#234" id="234">234</a>
<a href="#235" id="235">235</a>
<a href="#236" id="236">236</a>
<a href="#237" id="237">237</a>
<a href="#238" id="238">238</a>
<a href="#239" id="239">239</a>
<a href="#240" id="240">240</a>
<a href="#241" id="241">241</a>
<a href="#242" id="242">242</a>
<a href="#243" id="243">243</a>
<a href="#244" id="244">244</a>
<a href="#245" id="245">245</a>
<a href="#246" id="246">246</a>
<a href="#247" id="247">247</a>
<a href="#248" id="248">248</a>
<a href="#249" id="249">249</a>
<a href="#250" id="250">250</a>
<a href="#251" id="251">251</a>
<a href="#252" id="252">252</a>
<a href="#253" id="253">253</a>
<a href="#254" id="254">254</a>
<a href="#255" id="255">255</a>
<a href="#256" id="256">256</a>
<a href="#257" id="257">257</a>
<a href="#258" id="258">258</a>
<a href="#259" id="259">259</a>
<a href="#260" id="260">260</a>
<a href="#261" id="261">261</a>
<a href="#262" id="262">262</a>
<a href="#263" id="263">263</a>
<a href="#264" id="264">264</a>
<a href="#265" id="265">265</a>
<a href="#266" id="266">266</a>
<a href="#267" id="267">267</a>
<a href="#268" id="268">268</a>
<a href="#269" id="269">269</a>
<a href="#270" id="270">270</a>
<a href="#271" id="271">271</a>
<a href="#272" id="272">272</a>
<a href="#273" id="273">273</a>
<a href="#274" id="274">274</a>
<a href="#275" id="275">275</a>
<a href="#276" id="276">276</a>
<a href="#277" id="277">277</a>
<a href="#278" id="278">278</a>
<a href="#279" id="279">279</a>
<a href="#280" id="280">280</a>
<a href="#281" id="281">281</a>
<a href="#282" id="282">282</a>
<a href="#283" id="283">283</a>
<a href="#284" id="284">284</a>
<a href="#285" id="285">285</a>
<a href="#286" id="286">286</a>
<a href="#287" id="287">287</a>
<a href="#288" id="288">288</a>
<a href="#289" id="289">289</a>
<a href="#290" id="290">290</a>
<a href="#291" id="291">291</a>
<a href="#292" id="292">292</a>
<a href="#293" id="293">293</a>
<a href="#294" id="294">294</a>
<a href="#295" id="295">295</a>
<a href="#296" id="296">296</a>
<a href="#297" id="297">297</a>
<a href="#298" id="298">298</a>
<a href="#299" id="299">299</a>
<a href="#300" id="300">300</a>
<a href="#301" id="301">301</a>
<a href="#302" id="302">302</a>
<a href="#303" id="303">303</a>
<a href="#304" id="304">304</a>
<a href="#305" id="305">305</a>
<a href="#306" id="306">306</a>
<a href="#307" id="307">307</a>
<a href="#308" id="308">308</a>
<a href="#309" id="309">309</a>
<a href="#310" id="310">310</a>
<a href="#311" id="311">311</a>
<a href="#312" id="312">312</a>
<a href="#313" id="313">313</a>
<a href="#314" id="314">314</a>
<a href="#315" id="315">315</a>
<a href="#316" id="316">316</a>
<a href="#317" id="317">317</a>
<a href="#318" id="318">318</a>
<a href="#319" id="319">319</a>
<a href="#320" id="320">320</a>
<a href="#321" id="321">321</a>
<a href="#322" id="322">322</a>
<a href="#323" id="323">323</a>
<a href="#324" id="324">324</a>
<a href="#325" id="325">325</a>
<a href="#326" id="326">326</a>
<a href="#327" id="327">327</a>
<a href="#328" id="328">328</a>
<a href="#329" id="329">329</a>
<a href="#330" id="330">330</a>
<a href="#331" id="331">331</a>
<a href="#332" id="332">332</a>
<a href="#333" id="333">333</a>
<a href="#334" id="334">334</a>
<a href="#335" id="335">335</a>
<a href="#336" id="336">336</a>
<a href="#337" id="337">337</a>
<a href="#338" id="338">338</a>
<a href="#339" id="339">339</a>
<a href="#340" id="340">340</a>
<a href="#341" id="341">341</a>
<a href="#342" id="342">342</a>
<a href="#343" id="343">343</a>
<a href="#344" id="344">344</a>
<a href="#345" id="345">345</a>
<a href="#346" id="346">346</a>
<a href="#347" id="347">347</a>
<a href="#348" id="348">348</a>
<a href="#349" id="349">349</a>
<a href="#350" id="350">350</a>
<a href="#351" id="351">351</a>
<a href="#352" id="352">352</a>
<a href="#353" id="353">353</a>
<a href="#354" id="354">354</a>
<a href="#355" id="355">355</a>
<a href="#356" id="356">356</a>
<a href="#357" id="357">357</a>
<a href="#358" id="358">358</a>
<a href="#359" id="359">359</a>
<a href="#360" id="360">360</a>
<a href="#361" id="361">361</a>
<a href="#362" id="362">362</a>
<a href="#363" id="363">363</a>
<a href="#364" id="364">364</a>
<a href="#365" id="365">365</a>
<a href="#366" id="366">366</a>
<a href="#367" id="367">367</a>
<a href="#368" id="368">368</a>
<a href="#369" id="369">369</a>
<a href="#370" id="370">370</a>
<a href="#371" id="371">371</a>
<a href="#372" id="372">372</a>
<a href="#373" id="373">373</a>
<a href="#374" id="374">374</a>
<a href="#375" id="375">375</a>
<a href="#376" id="376">376</a>
<a href="#377" id="377">377</a>
<a href="#378" id="378">378</a>
<a href="#379" id="379">379</a>
<a href="#380" id="380">380</a>
<a href="#381" id="381">381</a>
<a href="#382" id="382">382</a>
<a href="#383" id="383">383</a>
<a href="#384" id="384">384</a>
<a href="#385" id="385">385</a>
<a href="#386" id="386">386</a>
<a href="#387" id="387">387</a>
<a href="#388" id="388">388</a>
<a href="#389" id="389">389</a>
<a href="#390" id="390">390</a>
<a href="#391" id="391">391</a>
<a href="#392" id="392">392</a>
<a href="#393" id="393">393</a>
<a href="#394" id="394">394</a>
<a href="#395" id="395">395</a>
<a href="#396" id="396">396</a>
<a href="#397" id="397">397</a>
<a href="#398" id="398">398</a>
<a href="#399" id="399">399</a>
<a href="#400" id="400">400</a>
<a href="#401" id="401">401</a>
<a href="#402" id="402">402</a>
<a href="#403" id="403">403</a>
<a href="#404" id="404">404</a>
<a href="#405" id="405">405</a>
<a href="#406" id="406">406</a>
<a href="#407" id="407">407</a>
<a href="#408" id="408">408</a>
<a href="#409" id="409">409</a>
<a href="#410" id="410">410</a>
<a href="#411" id="411">411</a>
<a href="#412" id="412">412</a>
<a href="#413" id="413">413</a>
<a href="#414" id="414">414</a>
<a href="#415" id="415">415</a>
<a href="#416" id="416">416</a>
<a href="#417" id="417">417</a>
<a href="#418" id="418">418</a>
<a href="#419" id="419">419</a>
<a href="#420" id="420">420</a>
<a href="#421" id="421">421</a>
<a href="#422" id="422">422</a>
<a href="#423" id="423">423</a>
<a href="#424" id="424">424</a>
<a href="#425" id="425">425</a>
<a href="#426" id="426">426</a>
<a href="#427" id="427">427</a>
<a href="#428" id="428">428</a>
<a href="#429" id="429">429</a>
<a href="#430" id="430">430</a>
<a href="#431" id="431">431</a>
<a href="#432" id="432">432</a>
<a href="#433" id="433">433</a>
<a href="#434" id="434">434</a>
<a href="#435" id="435">435</a>
<a href="#436" id="436">436</a>
<a href="#437" id="437">437</a>
<a href="#438" id="438">438</a>
<a href="#439" id="439">439</a>
<a href="#440" id="440">440</a>
<a href="#441" id="441">441</a>
<a href="#442" id="442">442</a>
<a href="#443" id="443">443</a>
<a href="#444" id="444">444</a>
<a href="#445" id="445">445</a>
<a href="#446" id="446">446</a>
<a href="#447" id="447">447</a>
<a href="#448" id="448">448</a>
<a href="#449" id="449">449</a>
<a href="#450" id="450">450</a>
<a href="#451" id="451">451</a>
<a href="#452" id="452">452</a>
<a href="#453" id="453">453</a>
<a href="#454" id="454">454</a>
<a href="#455" id="455">455</a>
<a href="#456" id="456">456</a>
<a href="#457" id="457">457</a>
<a href="#458" id="458">458</a>
<a href="#459" id="459">459</a>
<a href="#460" id="460">460</a>
<a href="#461" id="461">461</a>
<a href="#462" id="462">462</a>
<a href="#463" id="463">463</a>
<a href="#464" id="464">464</a>
<a href="#465" id="465">465</a>
<a href="#466" id="466">466</a>
<a href="#467" id="467">467</a>
<a href="#468" id="468">468</a>
<a href="#469" id="469">469</a>
<a href="#470" id="470">470</a>
<a href="#471" id="471">471</a>
<a href="#472" id="472">472</a>
<a href="#473" id="473">473</a>
<a href="#474" id="474">474</a>
<a href="#475" id="475">475</a>
<a href="#476" id="476">476</a>
<a href="#477" id="477">477</a>
<a href="#478" id="478">478</a>
<a href="#479" id="479">479</a>
<a href="#480" id="480">480</a>
<a href="#481" id="481">481</a>
<a href="#482" id="482">482</a>
<a href="#483" id="483">483</a>
<a href="#484" id="484">484</a>
<a href="#485" id="485">485</a>
<a href="#486" id="486">486</a>
<a href="#487" id="487">487</a>
<a href="#488" id="488">488</a>
<a href="#489" id="489">489</a>
<a href="#490" id="490">490</a>
<a href="#491" id="491">491</a>
<a href="#492" id="492">492</a>
<a href="#493" id="493">493</a>
<a href="#494" id="494">494</a>
<a href="#495" id="495">495</a>
<a href="#496" id="496">496</a>
<a href="#497" id="497">497</a>
<a href="#498" id="498">498</a>
<a href="#499" id="499">499</a>
<a href="#500" id="500">500</a>
<a href="#501" id="501">501</a>
<a href="#502" id="502">502</a>
<a href="#503" id="503">503</a>
<a href="#504" id="504">504</a>
<a href="#505" id="505">505</a>
<a href="#506" id="506">506</a>
<a href="#507" id="507">507</a>
<a href="#508" id="508">508</a>
<a href="#509" id="509">509</a>
<a href="#510" id="510">510</a>
<a href="#511" id="511">511</a>
<a href="#512" id="512">512</a>
<a href="#513" id="513">513</a>
<a href="#514" id="514">514</a>
<a href="#515" id="515">515</a>
<a href="#516" id="516">516</a>
<a href="#517" id="517">517</a>
<a href="#518" id="518">518</a>
<a href="#519" id="519">519</a>
<a href="#520" id="520">520</a>
<a href="#521" id="521">521</a>
<a href="#522" id="522">522</a>
<a href="#523" id="523">523</a>
<a href="#524" id="524">524</a>
<a href="#525" id="525">525</a>
<a href="#526" id="526">526</a>
<a href="#527" id="527">527</a>
<a href="#528" id="528">528</a>
<a href="#529" id="529">529</a>
<a href="#530" id="530">530</a>
<a href="#531" id="531">531</a>
<a href="#532" id="532">532</a>
<a href="#533" id="533">533</a>
<a href="#534" id="534">534</a>
<a href="#535" id="535">535</a>
<a href="#536" id="536">536</a>
<a href="#537" id="537">537</a>
<a href="#538" id="538">538</a>
<a href="#539" id="539">539</a>
<a href="#540" id="540">540</a>
<a href="#541" id="541">541</a>
<a href="#542" id="542">542</a>
<a href="#543" id="543">543</a>
<a href="#544" id="544">544</a>
<a href="#545" id="545">545</a>
<a href="#546" id="546">546</a>
<a href="#547" id="547">547</a>
<a href="#548" id="548">548</a>
<a href="#549" id="549">549</a>
<a href="#550" id="550">550</a>
<a href="#551" id="551">551</a>
<a href="#552" id="552">552</a>
<a href="#553" id="553">553</a>
<a href="#554" id="554">554</a>
<a href="#555" id="555">555</a>
<a href="#556" id="556">556</a>
<a href="#557" id="557">557</a>
<a href="#558" id="558">558</a>
<a href="#559" id="559">559</a>
<a href="#560" id="560">560</a>
<a href="#561" id="561">561</a>
<a href="#562" id="562">562</a>
<a href="#563" id="563">563</a>
<a href="#564" id="564">564</a>
<a href="#565" id="565">565</a>
<a href="#566" id="566">566</a>
<a href="#567" id="567">567</a>
<a href="#568" id="568">568</a>
<a href="#569" id="569">569</a>
<a href="#570" id="570">570</a>
<a href="#571" id="571">571</a>
<a href="#572" id="572">572</a>
<a href="#573" id="573">573</a>
<a href="#574" id="574">574</a>
<a href="#575" id="575">575</a>
<a href="#576" id="576">576</a>
<a href="#577" id="577">577</a>
<a href="#578" id="578">578</a>
<a href="#579" id="579">579</a>
<a href="#580" id="580">580</a>
<a href="#581" id="581">581</a>
<a href="#582" id="582">582</a>
<a href="#583" id="583">583</a>
<a href="#584" id="584">584</a>
<a href="#585" id="585">585</a>
<a href="#586" id="586">586</a>
<a href="#587" id="587">587</a>
<a href="#588" id="588">588</a>
<a href="#589" id="589">589</a>
<a href="#590" id="590">590</a>
<a href="#591" id="591">591</a>
<a href="#592" id="592">592</a>
<a href="#593" id="593">593</a>
<a href="#594" id="594">594</a>
</pre><pre class="rust"><code><span class="comment">// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
</span><span class="doccomment">//! An implementation of SipHash.
</span><span class="kw">use </span>core::cmp;
<span class="kw">use </span>core::hash;
<span class="kw">use </span>core::hash::Hasher <span class="kw">as _</span>;
<span class="kw">use </span>core::marker::PhantomData;
<span class="kw">use </span>core::mem;
<span class="kw">use </span>core::ptr;
<span class="kw">use </span>core::u64;
<span class="doccomment">/// An implementation of SipHash 1-3.
///
/// See: <https://www.aumasson.jp/siphash/siphash.pdf>
</span><span class="attr">#[derive(Debug, Clone, Copy, Default)]
#[cfg_attr(feature = <span class="string">"serde"</span>, derive(serde::Serialize, serde::Deserialize))]
</span><span class="kw">pub struct </span>SipHasher13 {
hasher: Hasher<Sip13Rounds>,
}
<span class="doccomment">/// An implementation of SipHash 2-4.
///
/// See: <https://www.aumasson.jp/siphash/siphash.pdf>
</span><span class="attr">#[derive(Debug, Clone, Copy, Default)]
#[cfg_attr(feature = <span class="string">"serde"</span>, derive(serde::Serialize, serde::Deserialize))]
</span><span class="kw">pub struct </span>SipHasher24 {
hasher: Hasher<Sip24Rounds>,
}
<span class="doccomment">/// An implementation of SipHash 2-4.
///
/// See: <https://www.aumasson.jp/siphash/siphash.pdf>
///
/// SipHash is a general-purpose hashing function: it runs at a good
/// speed (competitive with Spooky and City) and permits strong _keyed_
/// hashing. This lets you key your hashtables from a strong RNG, such as
/// [`rand::os::OsRng`](https://doc.rust-lang.org/rand/rand/os/struct.OsRng.html).
///
/// Although the SipHash algorithm is considered to be generally strong,
/// it is not intended for cryptographic purposes. As such, all
/// cryptographic uses of this implementation are _strongly discouraged_.
</span><span class="attr">#[derive(Debug, Clone, Copy, Default)]
#[cfg_attr(feature = <span class="string">"serde"</span>, derive(serde::Serialize, serde::Deserialize))]
</span><span class="kw">pub struct </span>SipHasher(SipHasher24);
<span class="attr">#[derive(Debug, Clone, Copy)]
#[cfg_attr(feature = <span class="string">"serde"</span>, derive(serde::Serialize, serde::Deserialize))]
</span><span class="kw">struct </span>Hasher<S: Sip> {
k0: u64,
k1: u64,
length: usize, <span class="comment">// how many bytes we've processed
</span>state: State, <span class="comment">// hash State
</span>tail: u64, <span class="comment">// unprocessed bytes le
</span>ntail: usize, <span class="comment">// how many bytes in tail are valid
</span>_marker: PhantomData<S>,
}
<span class="attr">#[derive(Debug, Clone, Copy)]
#[cfg_attr(feature = <span class="string">"serde"</span>, derive(serde::Serialize, serde::Deserialize))]
</span><span class="kw">struct </span>State {
<span class="comment">// v0, v2 and v1, v3 show up in pairs in the algorithm,
// and simd implementations of SipHash will use vectors
// of v02 and v13. By placing them in this order in the struct,
// the compiler can pick up on just a few simd optimizations by itself.
</span>v0: u64,
v2: u64,
v1: u64,
v3: u64,
}
<span class="macro">macro_rules! </span>compress {
(<span class="macro-nonterminal">$state</span>:expr) => {{
<span class="macro">compress!</span>(<span class="macro-nonterminal">$state</span>.v0, <span class="macro-nonterminal">$state</span>.v1, <span class="macro-nonterminal">$state</span>.v2, <span class="macro-nonterminal">$state</span>.v3)
}};
(<span class="macro-nonterminal">$v0</span>:expr, <span class="macro-nonterminal">$v1</span>:expr, <span class="macro-nonterminal">$v2</span>:expr, <span class="macro-nonterminal">$v3</span>:expr) => {{
<span class="macro-nonterminal">$v0 </span>= <span class="macro-nonterminal">$v0</span>.wrapping_add(<span class="macro-nonterminal">$v1</span>);
<span class="macro-nonterminal">$v1 </span>= <span class="macro-nonterminal">$v1</span>.rotate_left(<span class="number">13</span>);
<span class="macro-nonterminal">$v1 </span>^= <span class="macro-nonterminal">$v0</span>;
<span class="macro-nonterminal">$v0 </span>= <span class="macro-nonterminal">$v0</span>.rotate_left(<span class="number">32</span>);
<span class="macro-nonterminal">$v2 </span>= <span class="macro-nonterminal">$v2</span>.wrapping_add(<span class="macro-nonterminal">$v3</span>);
<span class="macro-nonterminal">$v3 </span>= <span class="macro-nonterminal">$v3</span>.rotate_left(<span class="number">16</span>);
<span class="macro-nonterminal">$v3 </span>^= <span class="macro-nonterminal">$v2</span>;
<span class="macro-nonterminal">$v0 </span>= <span class="macro-nonterminal">$v0</span>.wrapping_add(<span class="macro-nonterminal">$v3</span>);
<span class="macro-nonterminal">$v3 </span>= <span class="macro-nonterminal">$v3</span>.rotate_left(<span class="number">21</span>);
<span class="macro-nonterminal">$v3 </span>^= <span class="macro-nonterminal">$v0</span>;
<span class="macro-nonterminal">$v2 </span>= <span class="macro-nonterminal">$v2</span>.wrapping_add(<span class="macro-nonterminal">$v1</span>);
<span class="macro-nonterminal">$v1 </span>= <span class="macro-nonterminal">$v1</span>.rotate_left(<span class="number">17</span>);
<span class="macro-nonterminal">$v1 </span>^= <span class="macro-nonterminal">$v2</span>;
<span class="macro-nonterminal">$v2 </span>= <span class="macro-nonterminal">$v2</span>.rotate_left(<span class="number">32</span>);
}};
}
<span class="doccomment">/// Loads an integer of the desired type from a byte stream, in LE order. Uses
/// `copy_nonoverlapping` to let the compiler generate the most efficient way
/// to load it from a possibly unaligned address.
///
/// Unsafe because: unchecked indexing at `i..i+size_of(int_ty)`
</span><span class="macro">macro_rules! </span>load_int_le {
(<span class="macro-nonterminal">$buf</span>:expr, <span class="macro-nonterminal">$i</span>:expr, <span class="macro-nonterminal">$int_ty</span>:ident) => {{
<span class="macro">debug_assert!</span>(<span class="macro-nonterminal">$i </span>+ mem::size_of::<<span class="macro-nonterminal">$int_ty</span>>() <= <span class="macro-nonterminal">$buf</span>.len());
<span class="kw">let </span><span class="kw-2">mut </span>data = <span class="number">0 </span><span class="kw">as </span><span class="macro-nonterminal">$int_ty</span>;
ptr::copy_nonoverlapping(
<span class="macro-nonterminal">$buf</span>.as_ptr().add(<span class="macro-nonterminal">$i</span>),
<span class="kw-2">&mut </span>data <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_ as </span><span class="kw-2">*mut </span>u8,
mem::size_of::<<span class="macro-nonterminal">$int_ty</span>>(),
);
data.to_le()
}};
}
<span class="doccomment">/// Loads a u64 using up to 7 bytes of a byte slice. It looks clumsy but the
/// `copy_nonoverlapping` calls that occur (via `load_int_le!`) all have fixed
/// sizes and avoid calling `memcpy`, which is good for speed.
///
/// Unsafe because: unchecked indexing at start..start+len
</span><span class="attr">#[inline]
</span><span class="kw">unsafe fn </span>u8to64_le(buf: <span class="kw-2">&</span>[u8], start: usize, len: usize) -> u64 {
<span class="macro">debug_assert!</span>(len < <span class="number">8</span>);
<span class="kw">let </span><span class="kw-2">mut </span>i = <span class="number">0</span>; <span class="comment">// current byte index (from LSB) in the output u64
</span><span class="kw">let </span><span class="kw-2">mut </span>out = <span class="number">0</span>;
<span class="kw">if </span>i + <span class="number">3 </span>< len {
out = <span class="macro">load_int_le!</span>(buf, start + i, u32) <span class="kw">as </span>u64;
i += <span class="number">4</span>;
}
<span class="kw">if </span>i + <span class="number">1 </span>< len {
out |= (<span class="macro">load_int_le!</span>(buf, start + i, u16) <span class="kw">as </span>u64) << (i * <span class="number">8</span>);
i += <span class="number">2
</span>}
<span class="kw">if </span>i < len {
out |= (<span class="kw-2">*</span>buf.get_unchecked(start + i) <span class="kw">as </span>u64) << (i * <span class="number">8</span>);
i += <span class="number">1</span>;
}
<span class="macro">debug_assert_eq!</span>(i, len);
out
}
<span class="kw">impl </span>SipHasher {
<span class="doccomment">/// Creates a new `SipHasher` with the two initial keys set to 0.
</span><span class="attr">#[inline]
</span><span class="kw">pub fn </span>new() -> SipHasher {
SipHasher::new_with_keys(<span class="number">0</span>, <span class="number">0</span>)
}
<span class="doccomment">/// Creates a `SipHasher` that is keyed off the provided keys.
</span><span class="attr">#[inline]
</span><span class="kw">pub fn </span>new_with_keys(key0: u64, key1: u64) -> SipHasher {
SipHasher(SipHasher24::new_with_keys(key0, key1))
}
<span class="doccomment">/// Creates a `SipHasher` from a 16 byte key.
</span><span class="kw">pub fn </span>new_with_key(key: <span class="kw-2">&</span>[u8; <span class="number">16</span>]) -> SipHasher {
<span class="kw">let </span><span class="kw-2">mut </span>b0 = [<span class="number">0u8</span>; <span class="number">8</span>];
<span class="kw">let </span><span class="kw-2">mut </span>b1 = [<span class="number">0u8</span>; <span class="number">8</span>];
b0.copy_from_slice(<span class="kw-2">&</span>key[<span class="number">0</span>..<span class="number">8</span>]);
b1.copy_from_slice(<span class="kw-2">&</span>key[<span class="number">8</span>..<span class="number">16</span>]);
<span class="kw">let </span>key0 = u64::from_le_bytes(b0);
<span class="kw">let </span>key1 = u64::from_le_bytes(b1);
<span class="self">Self</span>::new_with_keys(key0, key1)
}
<span class="doccomment">/// Get the keys used by this hasher
</span><span class="kw">pub fn </span>keys(<span class="kw-2">&</span><span class="self">self</span>) -> (u64, u64) {
(<span class="self">self</span>.<span class="number">0</span>.hasher.k0, <span class="self">self</span>.<span class="number">0</span>.hasher.k1)
}
<span class="doccomment">/// Get the key used by this hasher as a 16 byte vector
</span><span class="kw">pub fn </span>key(<span class="kw-2">&</span><span class="self">self</span>) -> [u8; <span class="number">16</span>] {
<span class="kw">let </span><span class="kw-2">mut </span>bytes = [<span class="number">0u8</span>; <span class="number">16</span>];
bytes[<span class="number">0</span>..<span class="number">8</span>].copy_from_slice(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>.hasher.k0.to_le_bytes());
bytes[<span class="number">8</span>..<span class="number">16</span>].copy_from_slice(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>.hasher.k1.to_le_bytes());
bytes
}
<span class="doccomment">/// Hash a byte array - This is the easiest and safest way to use SipHash.
</span><span class="attr">#[inline]
</span><span class="kw">pub fn </span>hash(<span class="kw-2">&</span><span class="self">self</span>, bytes: <span class="kw-2">&</span>[u8]) -> u64 {
<span class="kw">let </span><span class="kw-2">mut </span>hasher = <span class="self">self</span>.<span class="number">0</span>.hasher;
hasher.write(bytes);
hasher.finish()
}
}
<span class="kw">impl </span>SipHasher13 {
<span class="doccomment">/// Creates a new `SipHasher13` with the two initial keys set to 0.
</span><span class="attr">#[inline]
</span><span class="kw">pub fn </span>new() -> SipHasher13 {
SipHasher13::new_with_keys(<span class="number">0</span>, <span class="number">0</span>)
}
<span class="doccomment">/// Creates a `SipHasher13` that is keyed off the provided keys.
</span><span class="attr">#[inline]
</span><span class="kw">pub fn </span>new_with_keys(key0: u64, key1: u64) -> SipHasher13 {
SipHasher13 {
hasher: Hasher::new_with_keys(key0, key1),
}
}
<span class="doccomment">/// Creates a `SipHasher13` from a 16 byte key.
</span><span class="kw">pub fn </span>new_with_key(key: <span class="kw-2">&</span>[u8; <span class="number">16</span>]) -> SipHasher13 {
<span class="kw">let </span><span class="kw-2">mut </span>b0 = [<span class="number">0u8</span>; <span class="number">8</span>];
<span class="kw">let </span><span class="kw-2">mut </span>b1 = [<span class="number">0u8</span>; <span class="number">8</span>];
b0.copy_from_slice(<span class="kw-2">&</span>key[<span class="number">0</span>..<span class="number">8</span>]);
b1.copy_from_slice(<span class="kw-2">&</span>key[<span class="number">8</span>..<span class="number">16</span>]);
<span class="kw">let </span>key0 = u64::from_le_bytes(b0);
<span class="kw">let </span>key1 = u64::from_le_bytes(b1);
<span class="self">Self</span>::new_with_keys(key0, key1)
}
<span class="doccomment">/// Get the keys used by this hasher
</span><span class="kw">pub fn </span>keys(<span class="kw-2">&</span><span class="self">self</span>) -> (u64, u64) {
(<span class="self">self</span>.hasher.k0, <span class="self">self</span>.hasher.k1)
}
<span class="doccomment">/// Get the key used by this hasher as a 16 byte vector
</span><span class="kw">pub fn </span>key(<span class="kw-2">&</span><span class="self">self</span>) -> [u8; <span class="number">16</span>] {
<span class="kw">let </span><span class="kw-2">mut </span>bytes = [<span class="number">0u8</span>; <span class="number">16</span>];
bytes[<span class="number">0</span>..<span class="number">8</span>].copy_from_slice(<span class="kw-2">&</span><span class="self">self</span>.hasher.k0.to_le_bytes());
bytes[<span class="number">8</span>..<span class="number">16</span>].copy_from_slice(<span class="kw-2">&</span><span class="self">self</span>.hasher.k1.to_le_bytes());
bytes
}
<span class="doccomment">/// Hash a byte array - This is the easiest and safest way to use SipHash.
</span><span class="attr">#[inline]
</span><span class="kw">pub fn </span>hash(<span class="kw-2">&</span><span class="self">self</span>, bytes: <span class="kw-2">&</span>[u8]) -> u64 {
<span class="kw">let </span><span class="kw-2">mut </span>hasher = <span class="self">self</span>.hasher;
hasher.write(bytes);
hasher.finish()
}
}
<span class="kw">impl </span>SipHasher24 {
<span class="doccomment">/// Creates a new `SipHasher24` with the two initial keys set to 0.
</span><span class="attr">#[inline]
</span><span class="kw">pub fn </span>new() -> SipHasher24 {
SipHasher24::new_with_keys(<span class="number">0</span>, <span class="number">0</span>)
}
<span class="doccomment">/// Creates a `SipHasher24` that is keyed off the provided keys.
</span><span class="attr">#[inline]
</span><span class="kw">pub fn </span>new_with_keys(key0: u64, key1: u64) -> SipHasher24 {
SipHasher24 {
hasher: Hasher::new_with_keys(key0, key1),
}
}
<span class="doccomment">/// Creates a `SipHasher24` from a 16 byte key.
</span><span class="kw">pub fn </span>new_with_key(key: <span class="kw-2">&</span>[u8; <span class="number">16</span>]) -> SipHasher24 {
<span class="kw">let </span><span class="kw-2">mut </span>b0 = [<span class="number">0u8</span>; <span class="number">8</span>];
<span class="kw">let </span><span class="kw-2">mut </span>b1 = [<span class="number">0u8</span>; <span class="number">8</span>];
b0.copy_from_slice(<span class="kw-2">&</span>key[<span class="number">0</span>..<span class="number">8</span>]);
b1.copy_from_slice(<span class="kw-2">&</span>key[<span class="number">8</span>..<span class="number">16</span>]);
<span class="kw">let </span>key0 = u64::from_le_bytes(b0);
<span class="kw">let </span>key1 = u64::from_le_bytes(b1);
<span class="self">Self</span>::new_with_keys(key0, key1)
}
<span class="doccomment">/// Get the keys used by this hasher
</span><span class="kw">pub fn </span>keys(<span class="kw-2">&</span><span class="self">self</span>) -> (u64, u64) {
(<span class="self">self</span>.hasher.k0, <span class="self">self</span>.hasher.k1)
}
<span class="doccomment">/// Get the key used by this hasher as a 16 byte vector
</span><span class="kw">pub fn </span>key(<span class="kw-2">&</span><span class="self">self</span>) -> [u8; <span class="number">16</span>] {
<span class="kw">let </span><span class="kw-2">mut </span>bytes = [<span class="number">0u8</span>; <span class="number">16</span>];
bytes[<span class="number">0</span>..<span class="number">8</span>].copy_from_slice(<span class="kw-2">&</span><span class="self">self</span>.hasher.k0.to_le_bytes());
bytes[<span class="number">8</span>..<span class="number">16</span>].copy_from_slice(<span class="kw-2">&</span><span class="self">self</span>.hasher.k1.to_le_bytes());
bytes
}
<span class="doccomment">/// Hash a byte array - This is the easiest and safest way to use SipHash.
</span><span class="attr">#[inline]
</span><span class="kw">pub fn </span>hash(<span class="kw-2">&</span><span class="self">self</span>, bytes: <span class="kw-2">&</span>[u8]) -> u64 {
<span class="kw">let </span><span class="kw-2">mut </span>hasher = <span class="self">self</span>.hasher;
hasher.write(bytes);
hasher.finish()
}
}
<span class="kw">impl</span><S: Sip> Hasher<S> {
<span class="attr">#[inline]
</span><span class="kw">fn </span>new_with_keys(key0: u64, key1: u64) -> Hasher<S> {
<span class="kw">let </span><span class="kw-2">mut </span>state = Hasher {
k0: key0,
k1: key1,
length: <span class="number">0</span>,
state: State {
v0: <span class="number">0</span>,
v1: <span class="number">0</span>,
v2: <span class="number">0</span>,
v3: <span class="number">0</span>,
},
tail: <span class="number">0</span>,
ntail: <span class="number">0</span>,
_marker: PhantomData,
};
state.reset();
state
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>reset(<span class="kw-2">&mut </span><span class="self">self</span>) {
<span class="self">self</span>.length = <span class="number">0</span>;
<span class="self">self</span>.state.v0 = <span class="self">self</span>.k0 ^ <span class="number">0x736f6d6570736575</span>;
<span class="self">self</span>.state.v1 = <span class="self">self</span>.k1 ^ <span class="number">0x646f72616e646f6d</span>;
<span class="self">self</span>.state.v2 = <span class="self">self</span>.k0 ^ <span class="number">0x6c7967656e657261</span>;
<span class="self">self</span>.state.v3 = <span class="self">self</span>.k1 ^ <span class="number">0x7465646279746573</span>;
<span class="self">self</span>.ntail = <span class="number">0</span>;
}
<span class="comment">// A specialized write function for values with size <= 8.
//
// The hashing of multi-byte integers depends on endianness. E.g.:
// - little-endian: `write_u32(0xDDCCBBAA)` == `write([0xAA, 0xBB, 0xCC, 0xDD])`
// - big-endian: `write_u32(0xDDCCBBAA)` == `write([0xDD, 0xCC, 0xBB, 0xAA])`
//
// This function does the right thing for little-endian hardware. On
// big-endian hardware `x` must be byte-swapped first to give the right
// behaviour. After any byte-swapping, the input must be zero-extended to
// 64-bits. The caller is responsible for the byte-swapping and
// zero-extension.
</span><span class="attr">#[inline]
</span><span class="kw">fn </span>short_write<T>(<span class="kw-2">&mut </span><span class="self">self</span>, _x: T, x: u64) {
<span class="kw">let </span>size = mem::size_of::<T>();
<span class="self">self</span>.length += size;
<span class="comment">// The original number must be zero-extended, not sign-extended.
</span><span class="macro">debug_assert!</span>(<span class="kw">if </span>size < <span class="number">8 </span>{ x >> (<span class="number">8 </span>* size) == <span class="number">0 </span>} <span class="kw">else </span>{ <span class="bool-val">true </span>});
<span class="comment">// The number of bytes needed to fill `self.tail`.
</span><span class="kw">let </span>needed = <span class="number">8 </span>- <span class="self">self</span>.ntail;
<span class="self">self</span>.tail |= x << (<span class="number">8 </span>* <span class="self">self</span>.ntail);
<span class="kw">if </span>size < needed {
<span class="self">self</span>.ntail += size;
<span class="kw">return</span>;
}
<span class="comment">// `self.tail` is full, process it.
</span><span class="self">self</span>.state.v3 ^= <span class="self">self</span>.tail;
S::c_rounds(<span class="kw-2">&mut </span><span class="self">self</span>.state);
<span class="self">self</span>.state.v0 ^= <span class="self">self</span>.tail;
<span class="self">self</span>.ntail = size - needed;
<span class="self">self</span>.tail = <span class="kw">if </span>needed < <span class="number">8 </span>{ x >> (<span class="number">8 </span>* needed) } <span class="kw">else </span>{ <span class="number">0 </span>};
}
}
<span class="kw">impl </span>hash::Hasher <span class="kw">for </span>SipHasher {
<span class="attr">#[inline]
</span><span class="kw">fn </span>write(<span class="kw-2">&mut </span><span class="self">self</span>, msg: <span class="kw-2">&</span>[u8]) {
<span class="self">self</span>.<span class="number">0</span>.write(msg)
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>finish(<span class="kw-2">&</span><span class="self">self</span>) -> u64 {
<span class="self">self</span>.<span class="number">0</span>.finish()
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_usize(<span class="kw-2">&mut </span><span class="self">self</span>, i: usize) {
<span class="self">self</span>.<span class="number">0</span>.write_usize(i);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u8(<span class="kw-2">&mut </span><span class="self">self</span>, i: u8) {
<span class="self">self</span>.<span class="number">0</span>.write_u8(i);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u16(<span class="kw-2">&mut </span><span class="self">self</span>, i: u16) {
<span class="self">self</span>.<span class="number">0</span>.write_u16(i);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u32(<span class="kw-2">&mut </span><span class="self">self</span>, i: u32) {
<span class="self">self</span>.<span class="number">0</span>.write_u32(i);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u64(<span class="kw-2">&mut </span><span class="self">self</span>, i: u64) {
<span class="self">self</span>.<span class="number">0</span>.write_u64(i);
}
}
<span class="kw">impl </span>hash::Hasher <span class="kw">for </span>SipHasher13 {
<span class="attr">#[inline]
</span><span class="kw">fn </span>write(<span class="kw-2">&mut </span><span class="self">self</span>, msg: <span class="kw-2">&</span>[u8]) {
<span class="self">self</span>.hasher.write(msg)
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>finish(<span class="kw-2">&</span><span class="self">self</span>) -> u64 {
<span class="self">self</span>.hasher.finish()
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_usize(<span class="kw-2">&mut </span><span class="self">self</span>, i: usize) {
<span class="self">self</span>.hasher.write_usize(i);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u8(<span class="kw-2">&mut </span><span class="self">self</span>, i: u8) {
<span class="self">self</span>.hasher.write_u8(i);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u16(<span class="kw-2">&mut </span><span class="self">self</span>, i: u16) {
<span class="self">self</span>.hasher.write_u16(i);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u32(<span class="kw-2">&mut </span><span class="self">self</span>, i: u32) {
<span class="self">self</span>.hasher.write_u32(i);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u64(<span class="kw-2">&mut </span><span class="self">self</span>, i: u64) {
<span class="self">self</span>.hasher.write_u64(i);
}
}
<span class="kw">impl </span>hash::Hasher <span class="kw">for </span>SipHasher24 {
<span class="attr">#[inline]
</span><span class="kw">fn </span>write(<span class="kw-2">&mut </span><span class="self">self</span>, msg: <span class="kw-2">&</span>[u8]) {
<span class="self">self</span>.hasher.write(msg)
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>finish(<span class="kw-2">&</span><span class="self">self</span>) -> u64 {
<span class="self">self</span>.hasher.finish()
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_usize(<span class="kw-2">&mut </span><span class="self">self</span>, i: usize) {
<span class="self">self</span>.hasher.write_usize(i);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u8(<span class="kw-2">&mut </span><span class="self">self</span>, i: u8) {
<span class="self">self</span>.hasher.write_u8(i);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u16(<span class="kw-2">&mut </span><span class="self">self</span>, i: u16) {
<span class="self">self</span>.hasher.write_u16(i);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u32(<span class="kw-2">&mut </span><span class="self">self</span>, i: u32) {
<span class="self">self</span>.hasher.write_u32(i);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u64(<span class="kw-2">&mut </span><span class="self">self</span>, i: u64) {
<span class="self">self</span>.hasher.write_u64(i);
}
}
<span class="kw">impl</span><S: Sip> hash::Hasher <span class="kw">for </span>Hasher<S> {
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_usize(<span class="kw-2">&mut </span><span class="self">self</span>, i: usize) {
<span class="self">self</span>.short_write(i, i.to_le() <span class="kw">as </span>u64);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u8(<span class="kw-2">&mut </span><span class="self">self</span>, i: u8) {
<span class="self">self</span>.short_write(i, i <span class="kw">as </span>u64);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u32(<span class="kw-2">&mut </span><span class="self">self</span>, i: u32) {
<span class="self">self</span>.short_write(i, i.to_le() <span class="kw">as </span>u64);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write_u64(<span class="kw-2">&mut </span><span class="self">self</span>, i: u64) {
<span class="self">self</span>.short_write(i, i.to_le());
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>write(<span class="kw-2">&mut </span><span class="self">self</span>, msg: <span class="kw-2">&</span>[u8]) {
<span class="kw">let </span>length = msg.len();
<span class="self">self</span>.length += length;
<span class="kw">let </span><span class="kw-2">mut </span>needed = <span class="number">0</span>;
<span class="kw">if </span><span class="self">self</span>.ntail != <span class="number">0 </span>{
needed = <span class="number">8 </span>- <span class="self">self</span>.ntail;
<span class="self">self</span>.tail |= <span class="kw">unsafe </span>{ u8to64_le(msg, <span class="number">0</span>, cmp::min(length, needed)) } << (<span class="number">8 </span>* <span class="self">self</span>.ntail);
<span class="kw">if </span>length < needed {
<span class="self">self</span>.ntail += length;
<span class="kw">return</span>;
} <span class="kw">else </span>{
<span class="self">self</span>.state.v3 ^= <span class="self">self</span>.tail;
S::c_rounds(<span class="kw-2">&mut </span><span class="self">self</span>.state);
<span class="self">self</span>.state.v0 ^= <span class="self">self</span>.tail;
<span class="self">self</span>.ntail = <span class="number">0</span>;
}
}
<span class="comment">// Buffered tail is now flushed, process new input.
</span><span class="kw">let </span>len = length - needed;
<span class="kw">let </span>left = len & <span class="number">0x7</span>;
<span class="kw">let </span><span class="kw-2">mut </span>i = needed;
<span class="kw">while </span>i < len - left {
<span class="kw">let </span>mi = <span class="kw">unsafe </span>{ <span class="macro">load_int_le!</span>(msg, i, u64) };
<span class="self">self</span>.state.v3 ^= mi;
S::c_rounds(<span class="kw-2">&mut </span><span class="self">self</span>.state);
<span class="self">self</span>.state.v0 ^= mi;
i += <span class="number">8</span>;
}
<span class="self">self</span>.tail = <span class="kw">unsafe </span>{ u8to64_le(msg, i, left) };
<span class="self">self</span>.ntail = left;
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>finish(<span class="kw-2">&</span><span class="self">self</span>) -> u64 {
<span class="kw">let </span><span class="kw-2">mut </span>state = <span class="self">self</span>.state;
<span class="kw">let </span>b: u64 = ((<span class="self">self</span>.length <span class="kw">as </span>u64 & <span class="number">0xff</span>) << <span class="number">56</span>) | <span class="self">self</span>.tail;
state.v3 ^= b;
S::c_rounds(<span class="kw-2">&mut </span>state);
state.v0 ^= b;
state.v2 ^= <span class="number">0xff</span>;
S::d_rounds(<span class="kw-2">&mut </span>state);
state.v0 ^ state.v1 ^ state.v2 ^ state.v3
}
}
<span class="kw">impl</span><S: Sip> Default <span class="kw">for </span>Hasher<S> {
<span class="doccomment">/// Creates a `Hasher<S>` with the two initial keys set to 0.
</span><span class="attr">#[inline]
</span><span class="kw">fn </span>default() -> Hasher<S> {
Hasher::new_with_keys(<span class="number">0</span>, <span class="number">0</span>)
}
}
<span class="attr">#[doc(hidden)]
</span><span class="kw">trait </span>Sip {
<span class="kw">fn </span>c_rounds(<span class="kw">_</span>: <span class="kw-2">&mut </span>State);
<span class="kw">fn </span>d_rounds(<span class="kw">_</span>: <span class="kw-2">&mut </span>State);
}
<span class="attr">#[derive(Debug, Clone, Copy, Default)]
</span><span class="kw">struct </span>Sip13Rounds;
<span class="kw">impl </span>Sip <span class="kw">for </span>Sip13Rounds {
<span class="attr">#[inline]
</span><span class="kw">fn </span>c_rounds(state: <span class="kw-2">&mut </span>State) {
<span class="macro">compress!</span>(state);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>d_rounds(state: <span class="kw-2">&mut </span>State) {
<span class="macro">compress!</span>(state);
<span class="macro">compress!</span>(state);
<span class="macro">compress!</span>(state);
}
}
<span class="attr">#[derive(Debug, Clone, Copy, Default)]
</span><span class="kw">struct </span>Sip24Rounds;
<span class="kw">impl </span>Sip <span class="kw">for </span>Sip24Rounds {
<span class="attr">#[inline]
</span><span class="kw">fn </span>c_rounds(state: <span class="kw-2">&mut </span>State) {
<span class="macro">compress!</span>(state);
<span class="macro">compress!</span>(state);
}
<span class="attr">#[inline]
</span><span class="kw">fn </span>d_rounds(state: <span class="kw-2">&mut </span>State) {
<span class="macro">compress!</span>(state);
<span class="macro">compress!</span>(state);
<span class="macro">compress!</span>(state);
<span class="macro">compress!</span>(state);
}
}
</code></pre></div>
</section></main><div id="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="siphasher" data-themes="" data-resource-suffix="" data-rustdoc-version="1.69.0 (84c898d65 2023-04-16) (built from a source tarball)" data-search-js="search-8a59a8356673ec1f.js" data-settings-js="settings-f0c5c39777a9a2f6.js" data-settings-css="settings-0bcba95ff279c1db.css" ></div></body></html>